Ben Waite

My goal is to try to change the way people think about the na 944.I generally sit quietly in the background and listen in on one of the most commonly asked questions in this sight,how can i get more power out of my 944 na? I will not only use the readily available after market performance parts i will try to create new ones. I will do my best to answer that question for all of you. Future plans include ported,polished and decked head paid for and on the way. Knife edged crank,aluminum flywheel,autothority chip already installed.Camshaft,deciding which one to use as we speak,and in the future bored and stroked. I read somewere that a guy got 334 horsepower out of his 944 na we will see!

Ben Waite

yes the only way i can describe it is it's like a two stroke powerband once you hit 4000 rpm it just opens up.

Mike C.

Looks nice. I'm not trying to sound negative but don't you need to address intake manifold and head improvements to really get a benefit from this?

Gages 944

I'd like to see how this turns out, this sounds like all the stuf I want to do but the cars running and I dont have that much money to do that kind of engine work. I now have another project and now moneys going into that.

Ben Waite

mike c turn back a page and you will see there is a ported polished and decked head paid for and on the way.

Ben Waite

Sorry mike top of the page.

Ben Waite

sorry mike top of the page,and the intake was ported as seen in the pic.

86 951 Driver

Nothing hits like a 2 stroke unless its burning oil. Just saying I ride a 2 stroke streetbike. But i understand what you mean. Keep up the good work.

MrTom

Indeed. Larger throttle bodies have more benefit in forced induction apps. Even so, most times, the TB isn't restrictive at all. I have seen 1100hp on two 2" throttle bodies.

There are pages and pages and pages of TB size debates. Mathematically speaking, no, there isn't **** for gains with this on a stock motor. But countless people and dyno charts say otherwise. This with the head and cam will be nice.

Also, with NA, you need to remember velocity is key. This most certainly reduced velocity, but during my dads WOT stints, the motor isn't relying on velocity as much. It is relying on a complete lack of air flow restriction.

Olli Snellman

Easy way to get more power from N/A is to add adjustable cam gear.



I know one 944 with this gear got 19 additional horses. Re-done chip gave 5 hp more and change to better breathing exhaust system gave 7 hp. So total 31 extra ones compared to original. It's easy to figure some head work with more aggressive cam would give more, or just add 944 S head and you are easily well over 200 hp figures.

Porsche16V944

^^^
Need dyno sheets

Olli Snellman

Not my car and owner does not hang around this forum. I have seen those charts and i belived what i saw. That's enough for me.

harrisonrick

The RZ 350 is a fun bike...a buddy of mine had one for years. My neighbour has a MINT '86 RZ500....talk about a powerband!

I plan on the S2 intake/throttle body swap. There's a write up on 944online by a guy who did it, and he was very impressed with the results.

Porsche16V944

I don't know, 19HP on a SOHC motor with just a cam gear seems very optimistic.
5HP with a chip is fair
7HP with exhaust is up there too i think.

Now if these were flywheel numbers and not WHP, then ya i could see that.

MrTom

There is so much bull**** in this post you can see it from space. I am not calling you a liar, but who ever told you those kinds of gains from a cam gear, is full of fecal.

Cam gears don't ADD horsepower. They allow you to adjust your torque curve. That is it. I have a TTR gear on my volvo. The most gains I see from playing with it is from the pretty blue anodizing.

See a thread HERE on tbricks where a guy took an NA motor and ran back to back dyno runs while advancing, and retarding his cam gear. The graphs speak for themselves.

And it was also said elsewhere that the Porsche exhaust was straight through. Meaning even an exhaust on an NA will yield you near zero HP gains.